I just got my sphero and I've noticed that every time it moves it makes a weird noise, as if 2 pieces of metals were grinding. It sounds similar to this video: http://www.youtube.com/watch?v=15UbfWVeZlU
Can someone please confirm if this is normal (sounds like maybe it shouldn't be)
This sound is totally normal. That is the sound of the stabilizer (little triangle shaped piece) scraping against the inside of Sphero's shell as it rolls. This will cause no damage to your Sphero.